Portable stamp mill



July 28, M PALMASN 2,648,809

PORTABLE STAMP MILL Filed Oct. 25, 1934 5 Sheets-Sheet 2 July 28, 1936. M, PALMASON 048309 PORTABLE STAMP MILL Filed OCC. 23, 1954 3 Sheets-Sheet 3 Patented July 28, 1936 f- UNITED STATES Y 2,048,309- PORTABLE STAMP MILL Magnus Palmason, Sault Ste. Marie, Ontario,

` Canada l Application october 23, 1934, serial No. 749,662

Y In canada october 31, 193s 4 Claims. (Cl. 83-457) This invention relates to high` speed portable stamp mills and it consists in theconstructions, arrangements and combinations herein de scribed and claimed. k

The invention has for an object the provision of a stamp mill for reducing ore, which is inexpensive of construction and light in weight, so as to make it readily portable from place to place to meet the requirements of the average prospector.. Y

It is a further object ofthe invention to provide a stamp-mill in which a pair of crushing hammers are actuated through a single drive means. Y Y

It is another object of the invention to provide a novel adjusting means between the walking beam and its fulcrum, to accommodate for wear between the hammers and anvil.

It is a further objection of the invention to provide a clutch means for retaining the crushing hammers in neutral position until a proper working speed has been attained by the driving engine.

It is a still further object of the invention to provide a novel lubricating system for the connecting rods of the mill.

Additional objects, advantages and features of invention will be apparent from the following description, considered in conjunction with the accompanying drawings, wherein A Figure l is a side elevation of a mill constructed according to my invention.

Figure 2 is a front elevation thereof with a portion broken away.

Figure 3 is a rear elevation of the mill.

Figure 4 is an enlarged view, partly in section, illustrating the drive mechanism and clutching means.

Figure 5 is a detail of the clutch mechanism, parts of the frame structure of the mill having been removed.

Figure 6 is an enlarged detail view of the connection between the walking beam and fulcrum.

Figure 7 is a side elevation, partly in section, of the lubricator.

Figure 8 is a cross section thereof on the line 8-8 of Figure '7.

There is illustrated a. frame I0, preferably formed of angle iron, comprising a base plate II, medially of which there is a sub-frame I2 which functions as a fulcrum for the crushing hammers, as will be presently described. At the forward end of the frame I0, a pair of uprights I3 are secured, as at I4, the upper ends of the uprights being connected by a cross beam I5 and intermediate the lengthlof the uprights *.I3, a crossbeam I6 is secured'. The framing dened by the uprights I3, and the cross beams I5 and I6- provide for rthe mounting of the crushing hammers,` and since the frame will be subjected to considerable strain due to impact of the hammers, the framing is preferably braced, as at Il. The braces Il are shown as secured to the upper ends of the uprights I3 and extend to the rear of the base I0, where they are secured in 1 any'approved manner, as by bolts or otherwise. The braces Il may be connected by a cross beam I8, if desired.

`Upon the base II), there are a. pair of anvils I9;A positioned in a side by side relation, and enclosing these anvils there is a housing 20 for containing the ore to be crushed, and in order to readily determine the degree of fineness of the ore, the front wall 2| of the housing has a screened; opening 22.

Y The cross beam I5 is provided with a pair of vertically disposed apertures and the cross beam I6 is similarly apertured, these latter apertures being in alignment with those of the cross beam I5 and reciprocably mounted within each pair of aligned apertures there is a rod 2,3. The rods 23 are shown as comprising a pair of sections 23a and 231)l connected by a spool-shaped head 24. One end of the sections 23D of the rods are disposed within the housing 20 and mount crushing hammers 25. It will be understood that the hammers'are disposedimniediately above respective anvils I9. and cooperate therewith during crushing of ore.

` In order to actuate the hammers 25 walking beams 26 are rockably mounted, as at 21, upon the upper portion of the sub-frame I2. The pivots for the walking beams is clearly shown in Figure 6, wherein a yoke 28 mounts the walking beam by the pin 21. The yoke 28 includes a threaded stud 29 extended through a cross beam I2 of the frame, and upon the stud 29 there are lock nuts 3Il-3I arranged in opposed relation to the beam I2. By the construction, it will be apparent that the pivot 2l of the yoke may be raised or lowered by merely loosening the nuts 30-3I the desired degree, and then tightening the nuts. This adjustment will be required after long continued use of the mill, since there will cure contact between the spools and heads 33 and otherwise tension the beam 26, a tension spring 35 is xed between the beam and the' housing 20.

It should be noted that during operation of the mill, by the constructio-n of the disk heads 33 acting upon the heads 34 of the spools, a slight rotary action willbe imparted to the rods 23, which.l will yprevent uneven` wear uponthe rods and guide apertures.

Upon the rear portion of the base I there,i,Sf;

mounted a pair of bearing members ,36, within which there is journalled a shaft 31. Outwardf ly of each of the bearings 35and keyedutoV` thel shaft 31 there are combined fly and gear wheels,A

38. The gears are indicated at 39 and are formed upon the periphery of the fly-wheelsxthse-i'gearsYs 39 being in mesh with respective gears 40 'keyedl The shaft 40 is suitablymounted to a shaft 4l. in spaced bearings42, and between the bearings 42 lja, drive -pulley`43 is keyed to the shaft 4I, theV pulley"beingfrdriven fromv any suitable source through albeit 44." '-Attention`is nowy invited, particularly, to Figures Ll'a'nd of the drawings for an understandin'gof the? clutch'mech'anism and the drive for the walking beamsj The fly-wheels 38 are identical in yconstruction and therefore a' description of one will suffice for a" clear understanding thereof. A YVslot 45 is formed/'in the'V'ily-wheel extending diametrically thereof, terminating in lopposed baysv 46, adapted to receive a wrist pin 41 of a connecting rod 48. The other end of the connecting r'od 48 is pivotally connected to the walking beam 26, as rat 49. Bythis construction, as the slot`45 assumes avertical position'and the connecting'rod 48 is inits elevated position, the uppermost b ay 46 receives the pin 41 andthus the connecting' V'rod pulls the walking beam downwardly so as to raise its associated rod 23 to'fraise the hammer 25 associated therewitl'i. Upon reaching the VVopposite dead center of the fly-wheel the pin releases itselffromfthe bay and'llows the' pin'topassV upwardly through the slot where it is engaged by the othe'rbay 'which similarly 'operates to again raise the hammer.' f f It willb'e readily seen that bythe construction presentedtherotation of the fly-wheels operates tonrase thehammerssuccessively, in order that it may deliver working strokes against the anvils l so, as "to reduce 'theb're Vcontained in' the'housirgzt; "The walking beam is so adjusted that the force of the blow is not imparted tothe 'wrist pin 41.

A clutch mechanism, generally indicated at U, is provided, being utilized to maintain the harnm'ersin'a neutral position, until the engine or other power unit has attained sufficient speed. 'heclutch comprises an arm 5l having a hook end 52 adapted to fit over and engage the head 5340i the wristY pin 41'when it is in mid position. ln thisy position of thepin no force can be transmitted to it by the slotted wheel. The arm 5l is integral witljihabar V54 disposed horizontally` in bearings ,55.V The bar 5.4 is shiftably mounted in the ,bearings 55 so as to permit the ar.m 5| to shift ,toandawaywfrom the head 53. Coiled about the bar 54 is atension spring 5B for forcing the arm away from the head 53 and on the outside of one of thebearings 55 isfa shoulder 51 that limits the movement ofithe bar..y

- The bearings: 55 are vertically adjustable in order to/enable the hooked end 52 of thefarm to be set at the correct position for engaging and retaining the head. The adjustment of the bearings may'be accomplish-ed in various ways, but that shown in the drawings, by way of illustration, consists of threaded shanks 58 having lock nuts 59 engaged thereon by adjustment of which the bearings can be raised or lowered, as desired.

- Inuse of the clutch members, the hooked end 521 isforced over the had53 againstthe pressure of the spring 56 and the ilywheel 38 is turned so that the slot 45 assumes a vertical position. Such movement of the wheel 38 will bring the head 53 inf'positio'n to be engaged by the hoked end 52.

lfhe frictionalgontact between the head and hook issucient to maintain the parts in neutral position.

When-theengine--has attained its full working I "spee'dfthe walking beams are manually depressed ingorderjftq. lower the connecting rods 48 and thus free the heads 53 vfrom the hooked ends of vthe arm of the clutchi-f'Ifhis permits the spring 55 to shift the arm away from thejhead 53. jThe connecting rods can pnly be'depressed whenI the lslots -in the' wheels are invertical positionV and whenonce disengagement takes place the forceof the `hammerscausesthemfto rise and come into operation. In Figures Y'1 and" 8,' l-have illustratedjameans for supplying Vlubricant tothe wrist pinandslot.V A container 60 is secured toeach'ofthe connecting rods 48, a conduit 6| leading therefromtoa point of -discharg`e'-62.j" The disc'harge'l2 it will be noted opensdirectlyV within the slots 45 and upon the wrist pins 41. AIn' order that a predetermined quantity of lubricant will bey ejected at thev slot, the' containerll includesV a ball valve cage 63, housing a'ball valveI 64. The ball'valve rests withina seat 65 communicating withthe conduit 6|, and inV order to maintain the 'ball seated, vthe-valve comprises 'a'stem 66 and cross pin 61jand upon the stem there is a helical spring 68.- The spring-68 engages the pin 61 and an adjustable cap 69, and there kwill thus be a downward pressure upon thevalve. However, the'ball 64 is' unseatable, upon' impactfsuch as will 'be transmitted-upon completionof each stroke of connecting rods, and when so unseated will permit a discharge of lubricant into the conduit 6|. Thus the lubricant will b-e automatically fed to the slot'and wrist pin. I claimrz- 1."In a stamp mill,'a frame, a walking beam pivotally supported thereby, means for tensioning the beam, a connecting rod onl the beam, a rotary disk carried by the frame, said'disk having'a diametrical slot, apin on'the connecting rodengaged inthe slot, means for rotating Ythe disk, anda' hooked lever supported by the 'frame and movable into engagement with the pin tofrictionally holdithepin in a position concentric with the axis of rotation of the disk.

2. Inarstamp mill, a frame, a walking beam pivotally supported thereby;means for tensioning thebea'm, aconnecting rod on the beam, a rotary disk carried4 by th'e'frame, said disk having a" diametrical slot, a pin on the connecting'rodengaged in theslot, means for vrotating the disk, bearing members carried by the frame, a bar recip-rocably mounted therein, ashook mernberrigidly connectedwith the barrand adapted to'frictionally ,engagethe pin for holding the same a neutral position lin the slot, and springmeans for urging, theb-ar to a position tol releasethe hookmemberrfrom the pin. t 3. Ihestructure of uclaim 2 n which thebeai-,

ings are adjustable to set the hook member at a position for holding the pin concentric with the axis of the disk.

4. In a stamp mill, a frame, a walking beam rockably supported thereby, a spring member connected between one end of the beam and a portion of the frame tending to draw the beam down- Wardly, a connecting rod on the other end of the beam, a rotary disk on the frame, said disk having 10 a. diametrical slot, a pin on the connecting rod engaged in the slot, means for rotating the disk, bearing members carried by the frame, a bar reciprocably mounted therein, a rigid hook member on the bar adapted to frictionally engage the pin for holding the same in a neutral position in the slot, and spring means for urging the bar to a position to release the hook member from engagement with the pin.

MAGNUS PALMASON. 

